Table 2 Proposed skin testing concentrations
From: The complexities of insulin allergy: a case and approach
| Component | Recommended dilution | |
|---|---|---|
| SPT | Intradermal | |
| Insulin | No dilution | 1/100000–1/10 dilution, then 1/1 |
| Expedient (protamine, metacresol, zinc) | Vary depending on concentrations in insulin solutions. Attempt to dilute according to these concentrations | 1/1000–1/10 dilution |